/Engine/Source/Runtime/Engine/Classes/Animation/AnimBoneCompressionCodec.h
Allocates the necessary anim data structure used for decompression. The engine will serialize the data in/out and bind it.
virtual [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [ICompressedAnimData](API\Runtime\Engine\Animation\ICompressedAnimData) > AllocateAnimData() const